Year Built

Source

County assessor parcels · vintage 2026 · refresh cadence: continuous

Original construction year.

Direction of better

No universal direction; user preference determines what is "better".

Where the data lives

Tables: active_listings, parcels

Columns: year_built

Input field: year_built

JSON-LD example

Every value emitted by ValiFit (in /api/v1, MCP responses, on-page JSON-LD) carries a propertyID set to this metric_id, so AI clients can resolve it back here in one round-trip.

{
  "@type": "PropertyValue",
  "propertyID": "property.year_built",
  "name": "Year Built",
  "value": "example",
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "composite",
      "value": "Property"
    },
    {
      "@type": "PropertyValue",
      "name": "level",
      "value": "address"
    },
    {
      "@type": "PropertyValue",
      "name": "direction",
      "value": "optimize"
    },
    {
      "@type": "PropertyValue",
      "name": "source_year",
      "value": "2026"
    },
    {
      "@type": "PropertyValue",
      "name": "fha_safe",
      "value": true
    }
  ],
  "valueReference": {
    "@type": "QuantitativeValue",
    "additionalType": "https://valifit.com/catalog/metric",
    "identifier": "property.year_built",
    "sameAs": "County assessor parcels"
  },
  "mentions": [
    {
      "@type": "Dataset",
      "@id": "https://valifit.com/sources/county-assessor",
      "identifier": "COUNTY_ASSESSOR",
      "name": "County Assessor + Recorder Data",
      "url": "https://en.wikipedia.org/wiki/Property_tax_in_the_United_States",
      "sameAs": "https://en.wikipedia.org/wiki/Property_tax_in_the_United_States",
      "creator": {
        "@type": "Organization",
        "name": "County tax assessors (3,144 US counties)"
      },
      "temporalCoverage": "continuous",
      "dateModified": "2026-05-11"
    }
  ]
}